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Finding the Third Proportional to 299,439 and 656,287

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Solution

The third proportional to 299,439 and 656,287 is: 1,438,398.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,439 : 656,287 = 656,287 : x
  2. Step 2: Convert to fraction form
    299,439/656,287 = 656,287/x
  3. Step 3: Cross multiply
    299,439x = 656,287 × 656,287
  4. Step 4: Simplify right side
    299,439x = 430,712,626,369
  5. Step 5: Solve for x
    x = 430,712,626,369/299,439
  6. Step 6: Final answer
    x = 1,438,398.56

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.